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What is the metal to be added when testing for nitrates?
Reproduction
Carbon Monoxide
Dark blue solution is formed.
Aluminium
Chlorine
They are amphoteric.
Copper
NaCl
White precipitate formed when several drops of AgNO3 solution is added to salt Y. What is Y?
Reproduction
Carbon Monoxide
Dark blue solution is formed.
Aluminium
Chlorine
They are amphoteric.
Copper
NaCl
What is the gas which turns acidified potassium dichromate (VI) from orange to green?
Reproduction
Carbon Monoxide
Dark blue solution is formed.
Aluminium
Chlorine
They are amphoteric.
Copper
NaCl
What is the process when iron(II) hydroxide becomes iron(III) hydroxide called?
Reproduction
Carbon Monoxide
Dark blue solution is formed.
Aluminium
Chlorine
They are amphoteric.
Copper
NaCl
Excess ammonia solution is added to an aqueous solution which contains calcium ions and copper(II) ions. What should be observed?
Reproduction
Carbon Monoxide
Dark blue solution is formed.
Aluminium
Chlorine
They are amphoteric.
Copper
NaCl
What is a green-yellow, pungent gas which turns damp blue litmus paper red, then bleached?
Reproduction
Carbon Monoxide
Dark blue solution is formed.
Aluminium
Chlorine
They are amphoteric.
Copper
NaCl
What is the reason why zinc hydroxide, aluminium hydroxide and lead(II) hydroxide can dissolve in excess sodium hydroxide solution?
Reproduction
Carbon Monoxide
Dark blue solution is formed.
Aluminium
Chlorine
They are amphoteric.
Copper
NaCl
What is a metal cation which forms blue precipitate with alkali.
Reproduction
Carbon Monoxide
Dark blue solution is formed.
Aluminium
Chlorine
They are amphoteric.
Copper
NaCl
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